Mrs Philips is a 38 year old solicitor who attends the GP surgery complaining of breathlessness. She is speaking clearly to you and saying she has noticed a flare in her Asthma over the last few days.
On examination her heart rate is 105, respiratory rate is 24 and oxygen saturations are 94%. Peak flow is 60% of her best recorded reading and auscultation of her chest reveals widespread wheeze.
How would you grade the severity of Mrs Philips’ asthma attack?